class FishBuilder {
    createFish(): Fish {
        let positionX = Math.floor(Math.random() * 640);
        let positionY = Math.floor(Math.random() * 450 + 600);
        let fish = new Shark();
        fish.scaleX = 0.7;
        fish.scaleY = 0.7;
        return fish;
    }
}